# dlatzm.f(3) [centos man page]

```dlatzm.f(3)							      LAPACK							       dlatzm.f(3)

NAME
dlatzm.f -

SYNOPSIS
Functions/Subroutines
subroutine dlatzm (SIDE, M, N, V, INCV, TAU, C1, C2, LDC, WORK)
DLATZM

Function/Subroutine Documentation
subroutine dlatzm (characterSIDE, integerM, integerN, double precision, dimension( * )V, integerINCV, double precisionTAU, double precision,
dimension( ldc, * )C1, double precision, dimension( ldc, * )C2, integerLDC, double precision, dimension( * )WORK)
DLATZM

Purpose:

This routine is deprecated and has been replaced by routine DORMRZ.

DLATZM applies a Householder matrix generated by DTZRQF to a matrix.

Let P = I - tau*u*u**T,   u = ( 1 ),
( v )
where v is an (m-1) vector if SIDE = 'L', or a (n-1) vector if
SIDE = 'R'.

If SIDE equals 'L', let
C = [ C1 ] 1
[ C2 ] m-1
n
Then C is overwritten by P*C.

If SIDE equals 'R', let
C = [ C1, C2 ] m
1  n-1
Then C is overwritten by C*P.

Parameters:
SIDE

SIDE is CHARACTER*1
= 'L': form P * C
= 'R': form C * P

M

M is INTEGER
The number of rows of the matrix C.

N

N is INTEGER
The number of columns of the matrix C.

V

V is DOUBLE PRECISION array, dimension
(1 + (M-1)*abs(INCV)) if SIDE = 'L'
(1 + (N-1)*abs(INCV)) if SIDE = 'R'
The vector v in the representation of P. V is not used
if TAU = 0.

INCV

INCV is INTEGER
The increment between elements of v. INCV <> 0

TAU

TAU is DOUBLE PRECISION
The value tau in the representation of P.

C1

C1 is DOUBLE PRECISION array, dimension
(LDC,N) if SIDE = 'L'
(M,1)   if SIDE = 'R'
On entry, the n-vector C1 if SIDE = 'L', or the m-vector C1
if SIDE = 'R'.

On exit, the first row of P*C if SIDE = 'L', or the first
column of C*P if SIDE = 'R'.

C2

C2 is DOUBLE PRECISION array, dimension
(LDC, N)   if SIDE = 'L'
(LDC, N-1) if SIDE = 'R'
On entry, the (m - 1) x n matrix C2 if SIDE = 'L', or the
m x (n - 1) matrix C2 if SIDE = 'R'.

On exit, rows 2:m of P*C if SIDE = 'L', or columns 2:m of C*P
if SIDE = 'R'.

LDC

LDC is INTEGER
The leading dimension of the arrays C1 and C2. LDC >= (1,M).

WORK

WORK is DOUBLE PRECISION array, dimension
(N) if SIDE = 'L'
(M) if SIDE = 'R'

Author:
Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:
November 2011

Definition at line 152 of file dlatzm.f.

Author
Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2							  Tue Sep 25 2012						       dlatzm.f(3)```

## Check Out this Related Man Page

```dlatzm.f(3)							      LAPACK							       dlatzm.f(3)

NAME
dlatzm.f -

SYNOPSIS
Functions/Subroutines
subroutine dlatzm (SIDE, M, N, V, INCV, TAU, C1, C2, LDC, WORK)
DLATZM

Function/Subroutine Documentation
subroutine dlatzm (characterSIDE, integerM, integerN, double precision, dimension( * )V, integerINCV, double precisionTAU, double precision,
dimension( ldc, * )C1, double precision, dimension( ldc, * )C2, integerLDC, double precision, dimension( * )WORK)
DLATZM

Purpose:

This routine is deprecated and has been replaced by routine DORMRZ.

DLATZM applies a Householder matrix generated by DTZRQF to a matrix.

Let P = I - tau*u*u**T,   u = ( 1 ),
( v )
where v is an (m-1) vector if SIDE = 'L', or a (n-1) vector if
SIDE = 'R'.

If SIDE equals 'L', let
C = [ C1 ] 1
[ C2 ] m-1
n
Then C is overwritten by P*C.

If SIDE equals 'R', let
C = [ C1, C2 ] m
1  n-1
Then C is overwritten by C*P.

Parameters:
SIDE

SIDE is CHARACTER*1
= 'L': form P * C
= 'R': form C * P

M

M is INTEGER
The number of rows of the matrix C.

N

N is INTEGER
The number of columns of the matrix C.

V

V is DOUBLE PRECISION array, dimension
(1 + (M-1)*abs(INCV)) if SIDE = 'L'
(1 + (N-1)*abs(INCV)) if SIDE = 'R'
The vector v in the representation of P. V is not used
if TAU = 0.

INCV

INCV is INTEGER
The increment between elements of v. INCV <> 0

TAU

TAU is DOUBLE PRECISION
The value tau in the representation of P.

C1

C1 is DOUBLE PRECISION array, dimension
(LDC,N) if SIDE = 'L'
(M,1)   if SIDE = 'R'
On entry, the n-vector C1 if SIDE = 'L', or the m-vector C1
if SIDE = 'R'.

On exit, the first row of P*C if SIDE = 'L', or the first
column of C*P if SIDE = 'R'.

C2

C2 is DOUBLE PRECISION array, dimension
(LDC, N)   if SIDE = 'L'
(LDC, N-1) if SIDE = 'R'
On entry, the (m - 1) x n matrix C2 if SIDE = 'L', or the
m x (n - 1) matrix C2 if SIDE = 'R'.

On exit, rows 2:m of P*C if SIDE = 'L', or columns 2:m of C*P
if SIDE = 'R'.

LDC

LDC is INTEGER
The leading dimension of the arrays C1 and C2. LDC >= (1,M).

WORK

WORK is DOUBLE PRECISION array, dimension
(N) if SIDE = 'L'
(M) if SIDE = 'R'

Author:
Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:
November 2011

Definition at line 152 of file dlatzm.f.

Author
Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.1							  Sun May 26 2013						       dlatzm.f(3)```
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